CN201682262U - Electric leakage protection device suitable for electric water heater - Google Patents
Electric leakage protection device suitable for electric water heater Download PDFInfo
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- CN201682262U CN201682262U CN2010201817676U CN201020181767U CN201682262U CN 201682262 U CN201682262 U CN 201682262U CN 2010201817676 U CN2010201817676 U CN 2010201817676U CN 201020181767 U CN201020181767 U CN 201020181767U CN 201682262 U CN201682262 U CN 201682262U
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Abstract
The utility model relates to an electric leakage protection device suitable for an electric water heater, which belongs to the technical field of safety and protection of electric water heaters. The electric leakage protection device comprises a main body which is separated from a water heater in arrangement; a control circuit is included in the main body and mainly comprises a live wire and null wire mutual inductor, a ground wire mutual inductor, a live wire on/off relay, a null wire on/off relay, a ground wire on/off relay and a control unit with a MCU; the live wire, the null wire and the ground wire from a power supply circuit respectively pass through the corresponding on/off relays and are connected to the water heater through a lead wire; the live wire and null wire mutual inductor and the ground wire mutual inductor are respectively coupled with the live wire and the null wire as well as the ground wire; the signal output terminals of the live wire and null wire mutual inductor and the ground wire mutual inductor are respectively connected with the controlled terminals of the relays through the control unit; and the communication input and output terminals of the MCU in the control unit are in communication connection with control buttons and a display device respectively. The electric leakage protection device of the utility model ensures that the loss of the leakage protection function can not be caused by the operation of a user, thereby effectively protecting the electricity safety of the user.
Description
Technical field
The utility model relates to a kind of Electrical Safety protective device, and especially a kind of earth leakage protective device that is suitable for electric heater belongs to electric heater safety protection technique field.
Background technology
Understand according to the applicant, electric heater often adopts the earth leakage protective of Lou protecting under the plug realization ground wire electrification situation.Existing this type of earth leakage protective device in use reflects following shortcoming:
1) in order to ensure safety, when wishing bathing, the user thoroughly cuts off the electricity supply, though have mains switch on the earth leakage protective socket, in order to keep away water, this socket position is higher than water-heater water tank, so manipulation of switches is very inconvenient;
2) earth leakage protective automatic outage performer is arranged in the control circuit at water heater place, when its protectiveness is cut off the power supply automatically, therefore plug is still charged to the lead wire of water heater, and when damaged or other analogues existed as wire harness, water heater still might be charged;
3) performer that cuts off the power supply automatically is mainly the mechanical trip gear of pure hardware, and it is reliable inadequately to carry out action;
4) restore electricity and need hand-reset, also make the user feel inconvenience.
Retrieval is found; the patent No. is that 200320106341 Chinese patent discloses a kind of automatic power-off protector; its principle is the current signal that detects zero, differs in size on the fire by current transformer, by making the relay coil dead electricity after the processing such as amplifications, rectification, thus the disconnection main circuit power.Advantage can be cut off the power supply automatically for when leaky appears in electrical equipment, and making power supply to the voltage on the electrical equipment is zero, has solved shortcomings such as the contact of leaking guarantor's mechanical actuating mechanism is unreliable.But do not have the ground wire protection, when electric leakage appears in ground wire, can't cut off the power supply, the protection personal safety; And existing leakage to protect little electric current electric leakage can't detect or insensitive shortcoming.
The utility model content
The purpose of this utility model primarily is: at the shortcoming that above-mentioned prior art exists, propose a kind of dump control conveniently, in the time of can guaranteeing to leak electricity lead wire not with the earth leakage protective device that is suitable for electric heater of forceful electric power.
The further purpose of the utility model is: propose a kind of earth leakage protective device that is suitable for electric heater with double protection functions, thereby guarantee the safe in utilization of electric heater.
The utility model further purpose is: the earth leakage protective device that is suitable for electric heater that provide a kind of water outlet to cut off the power supply automatically, water finishes automatic recovery of power supply, thereby the safety guarantee of providing convenience for the user.
In order to reach above purpose, the earth leakage protective device basic technical scheme that the utility model is suitable for electric heater is: comprise the main body that is provided with the water heater split, contain control circuit in the described main body, described control circuit mainly is made of fiery zero line instrument transformer, ground wire instrument transformer, live wire break-make relay, zero line break-make relay, ground wire break-make relay and the control unit that contains MCU; The live wire, zero line, the ground wire that are derived from supply line are connected to water heater by lead wire respectively behind the break-make relay of correspondence; Described fiery zero line instrument transformer, ground wire instrument transformer are coupled with live wire and zero line, ground wire respectively; The signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of each relay through control unit; Communication is connected the communication input and output side of MCU with display unit with operational and controlled key button respectively in the described control unit.
The one of further perfect of above technical scheme is: described control unit is made of comparison circuit and MCU; The signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the signal input part of MCU by comparison circuit, and the control output end of described MCU connects the controlled end of each relay.
Further perfect two of above technical scheme is: described control unit contains comparison circuit, and the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of each relay through comparison circuit.
In order to reach further purpose: described comparison circuit comprises first and second comparison circuits in parallel, the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of described live wire break-make relay, zero line break-make relay, ground wire break-make relay respectively by first comparison circuit and master control relay; Simultaneously the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer also connects the signal input part of MCU respectively by second comparison circuit, the start to exchange fire controlled end of line break-make relay, zero line break-make relay, ground wire break-make relay of the control output end of described MCU.Formed the duplicate protection of hardware circuit and software circuit like this.
In order to reach further purpose: described MCU corresponding signal input also is connected to and is positioned at the human body sensor that electric heater depotition cock place is controlled by selector switch, therefore the function that cut off the power supply automatically in the time of can realizing water outlet, water finishes automatic recovery of power supply is for the user provides practical safety guarantee.
Compared with prior art, the utlity model has following remarkable advantage:
1, user's socket switch is integrated in one with leaking the function of protecting, has guaranteed can not cause and leaked the forfeiture of protecting function, can effectively protect user's Electrical Safety because of user's operation.
2, the forceful electric power plate portion is moved to machine exterior, separate, do not have fully when leaking to make machine intimate under the various situations such as protecting action, user's shutdown, water outlet outage and connect power line with machine itself.The water outlet down techniques can be by existence infrared or ultrasonic technology perception user, as user during in the water zone, leaks by software control and to protect outage, thereby avoided the charged risk of machine, guarantees that fully the user uses hot water under the situation of not having electricity.When the user leaves the water zone, can reset automatically again simultaneously, re-power work, full intellectualized.
3, detect the leakage current that the loop can be detected zero live wire and ground wire simultaneously by increasing ground wire, not only disconnect zero line and live wire during electric leakage, disconnect ground wire simultaneously, use safer.It is littler to realize detecting leakage current by the software shutdown system, and rate of false alarm is lower, thereby has improved fail safe and reliability greatly.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a schematic block circuit diagram of the present utility model.
Fig. 2 is the shape assumption diagram of the utility model embodiment one.
Fig. 3 is the circuit theory diagrams of the utility model embodiment one.
Fig. 4 is the shape assumption diagram of the utility model embodiment two.
Fig. 5 is the utility model embodiment two circuit theory diagrams.
Embodiment
Embodiment one
The earth leakage protective device that present embodiment is suitable for electric heater is as shown in Figure 2: box-shaped body 1 and water heater 2 split settings; contain control circuit shown in Figure 3 (referring to Fig. 1) in the main body 1, this control circuit mainly is made of fiery zero line instrument transformer TR2, ground wire instrument transformer TR1, live wire break-make relay K 1, zero line break-make relay K 0, ground wire break-make relay K 2 and the control unit that contains MCU.Control unit contains first comparison circuit and main second comparison circuit and the MCU that is made of U2A, U2B that mainly are made of comparator U1A, U1B and constitutes.Communication is connected the communication input and output side of MCU with display unit DISPLAY with operational and controlled key button INPUT respectively in the control unit.Signal output part M2, the M2 ' of fire zero line instrument transformer TR2, ground wire instrument transformer TR1 and M1, M1 ' are respectively by behind corresponding comparator U1B, the U1A of first comparison circuit, by amplifying triode T2 and master control relay J 3, the controlled end of the line break-make of starting to exchange fire relay K 1, zero line break-make relay K 0, ground wire break-make relay K 2; Signal output part M2, the M2 ' of fiery zero line instrument transformer TR2, ground wire instrument transformer TR1 and M1, M1 ' also pass through corresponding comparator U2B, the U2A of second comparison circuit respectively simultaneously, connect the signal input part of MCU, the control output end of MCU is by the start to exchange fire controlled end of line break-make relay K 1, zero line break-make relay K 0, ground wire break-make relay K 2 of amplifying triode VT1, VT2.Constituted the double protection functions of hardware circuit and software circuit like this, in case leaky occurs, first comparison circuit is through hardware circuit, will directly cut off the forceful electric power connection line of all and electric heater rapidly by normally closed master control relay; And when hardware circuit broke down, second comparison circuit will be by software circuit, still can cut off the forceful electric power connection line of all and electric heater; Thereby play safety effect, guarantee safety.Because the MCU of above-mentioned software circuit etc. directly utilize by the former central controller spare that shifts out in the electric heater, so cost increases limited.
Embodiment two
The earth leakage protective device that present embodiment is suitable for electric heater as shown in Figure 4 and Figure 5, basic structure and embodiment one roughly the same, so schematic diagram is suitably simplified.Difference mainly contains:
1) the MCU corresponding signal input of control unit also is connected to the human body sensor that is positioned at electric heater depotition cock place and is controlled by selector switch (comprising transducers such as flow, temperature, infrared, ultrasonic wave), therefore can select according to the user, control by MCU, when water outlet, cut off the power supply automatically, water finishes automatic recovery of power supply, thereby provide practical safety guarantee for the user.
2) being placed in operational and controlled key button and display unit different on the electric heater with embodiment one is that button and display unit all are placed on this device main body.
Disconnect live wire break-make relay and zero line break-make relay earlier when 3) control circuit leaks electricity in order to be controlled at, the back disconnects ground wire break-make relay; Connect ground wire break-make relay when resetting power supply earlier, live wire break-make relay and zero line break-make relay are connected in the back; Safer like this.
4) owing to be provided with up and down the electric heating tube that distributes in the present embodiment electric heater, so outlet line is more.
The human body sensor that the water outlet outage of present embodiment is adopted can be leaving water temperature change sensor or water flow sensing unit or infrared sensor etc., when user's water, leak guarantor's outage by software control, thereby avoided the charged risk of machine, guaranteed that fully the user uses hot water under the situation of not having electricity.Leave when closing water as the user simultaneously, can reset automatically again, re-power work, realized intellectuality.After adopting modes such as leaving water temperature probe and water flow sensing unit to detect user's water, start the water outlet power down function, the output signal control relay disconnects.When transducing signals such as infrared probe or ultrasonic wave detected user's water, the output high level was given single-chip microcomputer, after the single-chip microcomputer identification, started the induction switching-off function, and the output signal control relay disconnects.
In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (8)
1. earth leakage protective device that is suitable for electric heater, comprise the main body that is provided with the water heater split, contain control circuit in the described main body, described control circuit mainly is made of fiery zero line instrument transformer, ground wire instrument transformer, live wire break-make relay, zero line break-make relay, ground wire break-make relay and control unit; The live wire, zero line, the ground wire that are derived from supply line are connected to water heater by lead wire respectively behind the break-make relay of correspondence; Described fiery zero line instrument transformer, ground wire instrument transformer are coupled with live wire and zero line, ground wire respectively; The signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of corresponding relay through control unit.
2. according to the described earth leakage protective device that is suitable for electric heater of claim 1, it is characterized in that: communication is connected the communication input and output side of described control unit with display unit with operational and controlled key button respectively.
3. according to the described earth leakage protective device that is suitable for electric heater of claim 2, it is characterized in that: described control unit is made of comparison circuit and MCU; The signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the signal input part of MCU by comparison circuit, and the control output end of described MCU connects the controlled end of described live wire break-make relay, zero line break-make relay, ground wire break-make relay.
4. according to the described earth leakage protective device that is suitable for electric heater of claim 2; it is characterized in that: described control unit contains comparison circuit, and the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of described live wire break-make relay, zero line break-make relay, ground wire break-make relay through comparison circuit.
5. according to the described earth leakage protective device that is suitable for electric heater of claim 2, it is characterized in that: described comparison circuit comprises first and second comparison circuits in parallel, the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer connects the controlled end of described live wire break-make relay, zero line break-make relay, ground wire break-make relay respectively by first comparison circuit and master control relay; Simultaneously the signal output part of described fiery zero line instrument transformer, ground wire instrument transformer also connects the signal input part of MCU respectively by second comparison circuit, the start to exchange fire controlled end of line break-make relay, zero line break-make relay, ground wire break-make relay of the control output end of described MCU.
6. according to claim 3, the 4 or 5 described earth leakage protective devices that are suitable for electric heater, it is characterized in that: described MCU corresponding signal input also is connected to the human body sensor that is controlled by selector switch.
7. according to the described earth leakage protective device that is suitable for electric heater of claim 6, it is characterized in that: described operational and controlled key button and display unit are placed on the electric heater.
8. according to the described earth leakage protective device that is suitable for electric heater of claim 7, it is characterized in that: described operational and controlled key button and display unit are placed on the described main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201817676U CN201682262U (en) | 2010-05-07 | 2010-05-07 | Electric leakage protection device suitable for electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201817676U CN201682262U (en) | 2010-05-07 | 2010-05-07 | Electric leakage protection device suitable for electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201682262U true CN201682262U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201817676U Expired - Fee Related CN201682262U (en) | 2010-05-07 | 2010-05-07 | Electric leakage protection device suitable for electric water heater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860006A (en) * | 2010-05-07 | 2010-10-13 | 艾欧史密斯(中国)热水器有限公司 | Electric leakage protection device suitable for electric water heater |
| CN103175303A (en) * | 2013-02-28 | 2013-06-26 | 宁波奥克斯空调有限公司 | Electrical control system used for heat-pump water heater and control method thereof |
| CN104201648A (en) * | 2014-09-15 | 2014-12-10 | 福建通用同溢电气有限公司 | New distribution connection method and device |
| CN104654596A (en) * | 2015-02-10 | 2015-05-27 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
| CN111198283A (en) * | 2020-02-26 | 2020-05-26 | 广西诚新慧创科技有限公司 | Power consumption safety monitoring extension socket |
-
2010
- 2010-05-07 CN CN2010201817676U patent/CN201682262U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860006A (en) * | 2010-05-07 | 2010-10-13 | 艾欧史密斯(中国)热水器有限公司 | Electric leakage protection device suitable for electric water heater |
| CN101860006B (en) * | 2010-05-07 | 2012-12-12 | 艾欧史密斯(中国)热水器有限公司 | Electric leakage protection device suitable for electric water heater |
| CN103175303A (en) * | 2013-02-28 | 2013-06-26 | 宁波奥克斯空调有限公司 | Electrical control system used for heat-pump water heater and control method thereof |
| CN104201648A (en) * | 2014-09-15 | 2014-12-10 | 福建通用同溢电气有限公司 | New distribution connection method and device |
| CN104654596A (en) * | 2015-02-10 | 2015-05-27 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN104654596B (en) * | 2015-02-10 | 2018-03-30 | 芜湖美的厨卫电器制造有限公司 | Electric heater |
| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
| CN111198283A (en) * | 2020-02-26 | 2020-05-26 | 广西诚新慧创科技有限公司 | Power consumption safety monitoring extension socket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20130507 |